US8138884B2 - Access control system having multiple sensing antenna coils - Google Patents
Access control system having multiple sensing antenna coils Download PDFInfo
- Publication number
- US8138884B2 US8138884B2 US11/891,035 US89103507A US8138884B2 US 8138884 B2 US8138884 B2 US 8138884B2 US 89103507 A US89103507 A US 89103507A US 8138884 B2 US8138884 B2 US 8138884B2
- Authority
- US
- United States
- Prior art keywords
- antenna coil
- coil pair
- antenna
- short
- electronics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/10—Movable barriers with registering means
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/005—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with variable reactance for tuning the antenna
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/10—Movable barriers with registering means
- G07C9/15—Movable barriers with registering means with arrangements to prevent the passage of more than one individual at a time
Definitions
- the invention relates to an access control system for a normally-open blocking system which controls the passage through an entrance lane.
- Such an apparatus is known from DE 10 2004 013 965 B3.
- a turnstile or similar blocking element in its basic position allows access, so that only in case of an access authorization being read as invalid and at the same time a person being detected by means of a people sensor the access is blocked.
- a first antenna coil having a greater distance to the blocking element and a second antenna coil having a smaller distance is provided at least at one side of the entrance lane.
- the distance of the antenna coils arranged one behind the other on one side of the entrance lane is small. The consequence is an inductive coupling of the antenna coils and thus mutual disturbances, which may render impossible the readout of a transponder.
- each oscillating circuit can be detuned or short-circuited.
- two antenna coils which are arranged on one side of the entrance lane in a short distance in entrance direction one behind the other, cannot influence each other when one antenna coil is actuated by the reading device for reading out the data from the transponder, and the other antenna coil is not actuated.
- the invention in particular is meant for an access control apparatus according to DE 10 2004 013 965 B3.
- a blocking system for an access control apparatus in the entrance lane of which a blocking system is provided that in its “open gate” basic position releases the entrance and only blocks upon the invalid reading of an access authorization and detection of a person by a people sensor.
- the blocking system is actuated by the reading device in dependence on a valid or invalid reading of an access authorization effected either by the first or the second of the two antenna coils arranged one behind the other.
- the blocking system can have e.g. a traffic light, which on blocking changes to red and on releasing changes to green, or a turnstile or similar blocking element.
- the reading device actuates the respective antenna coil pair, i.e. either the in entrance direction first or the second antenna coil pair at the same time, but alternately in an in-phase or antiphase operation mode.
- each antenna coil With each antenna coil a high-frequency field is produced, which permeates the interior of the transponder coil.
- the frequency can be e.g. less than 135 kilohertz or 13.56 megahertz.
- By induction at the transponder coil a voltage is produced, on which is based the energy supply of the data carrier (microchip) of the transponder and the data transmission between the reading device and the transponder.
- a transponder the coil surface of which extends in entrance direction, i.e. in parallel to the antenna coils, is permeated by the maximum number of field lines in the interior of the transponder coil, so that the reading reliability reaches a maximum.
- the superposition of the individual fields of the two antenna coils in the antiphase operation mode leads to field lines that extend in particular in the middle of the entrance lane between the two antenna coils alongside the entrance lane. I.e., when the coil surface of the transponder coil is arranged at right angles to the entrance direction, the interior of the transponder coil is permeated by the maximum number of field lines and thus the maximum reading reliability is achieved.
- the one operation mode with which a transponder is detected in the entrance lane is maintained until the reading transaction is completed.
- the non-active antennas i.e. the antennas not activated by the reading device for exchanging data do not influence the field course caused by the antennas active at that time.
- each oscillating circuit is provided with detuning or short-circuiting electronics.
- each detuning or short-circuiting electronics unit has at least one switch, preferably a diode switch, a low-voltage DC voltage, i.e. a DC voltage of less than 42 V, in particular approximately 5 V, being used for supplying such diode switch with power. This switching voltage is also used for the switch signal.
- the high-frequency cable which connects the reading device with the oscillating circuit with the respective antenna coil, at the same time can be used for the power supply and for transmitting the switch signals.
- additional cables do not have to be laid out, which is an important advantage, in particular when a front and a rear antenna coil pair is used, i.e. four oscillating circuits are provided, which have to be detuned or short-circuited.
- the access barriers When two or more access barriers are provided, the access barriers preferably are operated in a parallel or asynchronous fashion. With that a multiplexer between the barriers is no longer necessary, which means a substantial saving of time.
- the access control system according to the invention is suitable, for example, for ski lifts and similar transport systems. It is obvious that it can also be used for other applications, for example buildings, stadiums, public swimming pools and similar institutions.
- FIG. 1 shows a perspective view of an entrance lane having an access control apparatus for the “open gate” operation, the one antenna coil of the antenna coil pair adjoining the turning blocking device being left out;
- FIG. 2 shows a schematic plan view onto the entrance lane according to FIG. 1 , the turning blocking device being left out;
- FIGS. 3 and 4 show sections of two opposite antenna coils of the apparatus according to FIGS. 1 and 2 with the field line course in an in-phase or in an antiphase operation mode;
- FIG. 5 shows a plan view onto a transponder coil
- FIG. 6 shows an embodiment of a circuit configuration for the access control system according to the invention.
- the access control apparatus has a turning star with two barrier arms 2 , 3 as blocking element 1 for blocking entrance lane 4 , which is passed in the direction of arrow 5 .
- Blocking element 1 is rotatable around axis 6 inclined in relation to the horizontal line.
- Each of the two barrier arms 2 , 3 encloses an angle of about 45° with the axis of rotation 6 and with each other they enclose an angle of about 120°.
- FIG. 1 shows the barrier arms 2 , 3 in the “open gate” basic position, where they release the entrance 4 .
- the blocking element 1 By rotating the blocking element 1 corresponding to the arrow 7 the barrier arm 2 is turned upward into the position 2 ′ represented by dashed lines in FIG. 1 and thus the entrance 5 is blocked.
- barrier arm 2 , 3 instead of the two barrier arms 2 , 3 only one single barrier arm can be provided, which with the rotation axis 6 encloses an angle of about 45° and is rotatable into the blocking position 2 ′.
- This barrier arm can be rotatable always in the direction of passage (block-release) or can be moved in two directions.
- an antenna coil 12 , 13 , 14 or 15 is arranged respectively.
- the antenna coil 12 and 13 which are arranged on opposite sides of the entrance lane 4 , form a first antenna coil pair, and the antenna coils 14 and 15 form a second antenna coil pair.
- Antenna coils 12 to 15 are connected via HF-cable 16 , 17 , 18 , 19 to a joint reading device 20 ( FIG. 2 ). But it can also be provided that antenna coil pairs 12 and 13 or 14 and 15 respectively each have a reading device.
- Reading device 20 actuates blocking element 1 .
- the access authorization is read out, which is stored in a microchip 21 of the transponder 22 ( FIG. 5 ) carried by the user passing the entrance 4 .
- blocking element 1 will remain in release position, i.e. barrier arms 2 and 3 beside entrance lane 4 point downward. If, however, a person whose access authorization has been read as invalid passes the first antenna coil pair 12 , 13 and at the same time a people sensor 23 , e.g. a light barrier, barrier arm 2 will be swivelled into blocking position 2 ′ shown in FIG. 1 by dashed lines.
- barrier arm 2 ′ In order that the user, who then stands in front of barrier arm 2 ′, cannot pass blocking element 1 when a second user having valid access authorization follows, after the detection of a person by people sensor 23 and without a valid reading the first antenna coil pair 12 , 13 is deactivated and the second antenna coil pair 14 , is switched to an active position.
- a second check of the access authorization of the person standing in front of barrier arm 2 ′ is effected by antenna coil pair 14 , 15 .
- the antenna coil pair 12 , 13 is switched to be active and the antenna coil pair 14 , 15 is switched to be inactive and blocking element 1 again is turned into the release position.
- the RFID transponder 22 substantially consists of the antenna coil or transponder coil 24 with the microchip 21 as a data carrier.
- the active switched antenna coil pairs 12 and 13 or 14 and 15 produce a high-frequency field.
- the inductive coupling between the antenna coil pair 12 and 13 or 14 and 15 respectively with the transponder 22 is the stronger, the more field lines permeate the interior 25 of the transponder coil 24 .
- an in-phase activating of the two antenna coils 12 , 13 by the reading device 20 leads to a superposition of the individual fields of the antenna coils 12 , 13 at the two sides of entrance lane 4 to field lines 26 , which substantially extend at right angles to entrance lane 4 .
- the interior 25 of the transponder 24 is permeated by the maximum number of field lines 26 , so that the power consumption of the transponder 22 and thus the reading reliability achieves the maximum.
- the power consumption and thus the reading reliability is at its minimum, when the transponder coil 24 is arranged at right angles to the entrance direction, i.e. perpendicular to the antenna coils 12 , 13 , since then no, in any case only few field lines 26 permeate the transponder coil 24 .
- the superposition of the individual fields of the two antenna coils 12 , 13 in an antiphase operation mode according to FIG. 4 leads to field lines 27 which in particular extend in the middle of the entrance lane 4 between the two antenna coils 12 and 13 more alongside the entrance lane 4 .
- field lines 27 which in particular extend in the middle of the entrance lane 4 between the two antenna coils 12 and 13 more alongside the entrance lane 4 .
- the two antenna coils 12 , 13 are actuated at the same time, but alternately either in phase or in antiphase, by the reading device 20 .
- Pole 32 of switch 33 via a capacitor 38 is connected with parallel oscillating circuit 30 of antenna coil 12 (inductance) and with the in parallel switched capacitor 39 (capacitance).
- the capacitor 40 of the second parallel oscillating circuit 31 which consists of antenna coil 13 and capacitor 41 , is connectable with the pole 32 of the switch 33 via a 180° phase switch 44 .
- Phase switch 44 consists of a diode switch 45 , whose one pole 46 is connected directly with parallel oscillating circuit 31 , while the other pole 47 leads to parallel oscillating circuit 31 via a not displayed transformer having two coils for a 180° phase reversal. By switching diode switch 45 , the in-phase operation mode of the two oscillating circuits 30 , 31 can be switched into the antiphase operation mode.
- diode switch 45 When the access control apparatus is in operation, diode switch 45 is actuated by transmitting-receiving electronics 29 via control line 51 displayed by dashed lines and thereby is permanently switched back and forth between poles 46 , 47 .
- transmitting-receiving electronics 29 detects a transponder 22
- the operation mode wherein the transponder 22 was detected, is maintained until the reading transaction is completed, i.e. the data exchange between transmitting-receiving electronics 29 and transponder 22 is completed.
- the transponder 22 according to FIG. 3 when the transponder 22 according to FIG. 3 is carried e.g. in a side pocket and thus the transponder coil 24 is aligned with the entrance direction 5 , i.e. in parallel to the antenna coils 12 , 13 , and thus the transponder 22 is detected in the in-phase operation mode, i.e. when the diode switch 45 is connected to the pole 46 , this operation mode is maintained until the reading transaction is completed, whereas, when the transponder 22 with the transponder coil 24 according to FIG. 4 is carried e.g. in a breast pocket and the transponder 22 thus is detected in the antiphase operation mode, i.e. with the diode switch 45 connected to the pole 47 , the antiphase operation mode is maintained during the data exchange. After the end of the transaction, via the control line 51 the switching back and forth of the diode switch 45 is continued.
- the not actuated oscillating circuit is detuned or short-circuited.
- each oscillating circuit 30 , 31 is provided with detuning or short-circuiting electronics 52 , 53 .
- Detuning or short-circuiting electronics 52 , 53 for this purpose preferably has a (not displayed) diode switch.
- Detuning or short-circuiting electronics 52 , 53 is supplied with electricity through a low-voltage DC-voltage of e.g. 5 V, which at the same time supplies the switch signal for the diode switch of the detuning or short-circuiting electronics 53 , 53 .
- a coil 54 , 55 in a line 56 , 57 which is connected preceding the entry to the oscillating circuit 30 , 31 preceding the capacitor 38 , 39 and to the detuning or short-circuiting electronics 52 , 53 .
- an electronic switch 58 For actuating the detuning or short-circuiting electronics 52 , 53 of the two oscillating circuits 30 , 31 there is provided, for example, an electronic switch 58 , which is connected to the 5-V DC voltage for supplying the transmitting-receiving electronics 29 with power.
- the DC voltage for supplying the detuning or short-circuiting electronics with power and activating it can be supplied via the same high-frequency cable 16 , 17 of the detuning or short-circuiting electronics 52 , 53 of the oscillating circuits 30 , 31 , which connects the driver 36 with the oscillating circuits 30 , 31 .
- the switch 58 While the switch 58 is actuated via the control line 65 by the transmitting-receiving electronics 29 , the switch 33 , which connects the reading device with the two other antenna coils 14 , 15 , is actuated via the control line 66 of the transmitting-receiving electronics 29 .
- the not-displayed oscillating circuits with the antenna coils 14 , 15 are provided with the same detuning or short-circuiting electronics as the oscillating circuits 30 , 31 including the coils 54 , 55 in the lines 56 , 57 .
- the reading device 20 displayed in FIG. 6 by dashed lines can be formed by a circuit board, which accommodates all the components arranged therein.
Abstract
Description
Claims (11)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06016587 | 2006-08-08 | ||
EP06016587A EP1892676A1 (en) | 2006-08-08 | 2006-08-08 | Access control system |
EP06016587.5 | 2006-08-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20090051483A1 US20090051483A1 (en) | 2009-02-26 |
US8138884B2 true US8138884B2 (en) | 2012-03-20 |
Family
ID=37596174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/891,035 Expired - Fee Related US8138884B2 (en) | 2006-08-08 | 2007-08-08 | Access control system having multiple sensing antenna coils |
Country Status (3)
Country | Link |
---|---|
US (1) | US8138884B2 (en) |
EP (1) | EP1892676A1 (en) |
JP (1) | JP2008041096A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5437582B2 (en) * | 2008-03-12 | 2014-03-12 | 株式会社ユニバーサルエンターテインメント | Game betting device |
US8313028B2 (en) * | 2010-02-17 | 2012-11-20 | On Track Innovations Ltd. | Multiple antenna reading system suitable for use with contactless transaction devices |
DE102016215503A1 (en) * | 2016-08-18 | 2018-02-22 | Audi Ag | Electromagnetic decoupling of an antenna unit of a motor vehicle from an energy coupling device |
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US4527152A (en) * | 1979-09-14 | 1985-07-02 | Shin International, Inc. | Anti-shoplifting system |
US5321412A (en) * | 1991-05-13 | 1994-06-14 | Sensormatic Electronics Corporation | Antenna arrangement with reduced coupling between transmit antenna and receive antenna |
US5653192A (en) * | 1996-03-06 | 1997-08-05 | Alfa Laval Agri Inc. | Livestock identification apparatus |
US5661457A (en) * | 1995-06-19 | 1997-08-26 | Sensormatic Electronics Corporation | Directional antenna configuration for asset tracking system |
US5786763A (en) * | 1996-06-20 | 1998-07-28 | Sensormatic Electronics Corporation | Antenna multiplexer with isolation of switching elements |
JP2000011107A (en) * | 1998-06-25 | 2000-01-14 | Toshiba Corp | Radio card reader/writer |
US6042008A (en) * | 1996-07-01 | 2000-03-28 | Denso Corporation | Toll collection system of toll road and in-vehicle unit for the same |
US6170194B1 (en) * | 1995-11-16 | 2001-01-09 | Skidata Computer (Yesellschaft M.B.H.) | Turning blocking device |
JP2001273530A (en) * | 2000-03-24 | 2001-10-05 | Toyo Commun Equip Co Ltd | Gate system |
DE10059179C1 (en) * | 2000-11-29 | 2002-06-13 | Siemens Ag | Circuit device for automobile access control system antenna has current supply paths for different antenna elements supplied with in-phase or phase offset antenna signals |
US6450404B1 (en) * | 1999-08-24 | 2002-09-17 | Kabushiki Kaisha Toshiba | Gate system |
US6617960B1 (en) * | 1998-02-18 | 2003-09-09 | Teamaxess Ticketing Gmbh | Arrangement for controlling access of persons, and access terminal |
US20030174099A1 (en) * | 2002-01-09 | 2003-09-18 | Westvaco Corporation | Intelligent station using multiple RF antennae and inventory control system and method incorporating same |
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US7762022B2 (en) * | 2005-07-08 | 2010-07-27 | Bea, Inc. | Automatic door opening and closing system and method of control thereof |
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JPH10255003A (en) * | 1997-03-13 | 1998-09-25 | Omron Corp | Reader/writer |
AT4044U1 (en) * | 1999-09-22 | 2000-12-27 | Teamaxess Ticketing Gmbh | ACCESS CONTROL SYSTEM |
-
2006
- 2006-08-08 EP EP06016587A patent/EP1892676A1/en not_active Withdrawn
-
2007
- 2007-08-06 JP JP2007203729A patent/JP2008041096A/en active Pending
- 2007-08-08 US US11/891,035 patent/US8138884B2/en not_active Expired - Fee Related
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US4527152A (en) * | 1979-09-14 | 1985-07-02 | Shin International, Inc. | Anti-shoplifting system |
US5321412A (en) * | 1991-05-13 | 1994-06-14 | Sensormatic Electronics Corporation | Antenna arrangement with reduced coupling between transmit antenna and receive antenna |
US5661457A (en) * | 1995-06-19 | 1997-08-26 | Sensormatic Electronics Corporation | Directional antenna configuration for asset tracking system |
US6170194B1 (en) * | 1995-11-16 | 2001-01-09 | Skidata Computer (Yesellschaft M.B.H.) | Turning blocking device |
US5653192A (en) * | 1996-03-06 | 1997-08-05 | Alfa Laval Agri Inc. | Livestock identification apparatus |
US5786763A (en) * | 1996-06-20 | 1998-07-28 | Sensormatic Electronics Corporation | Antenna multiplexer with isolation of switching elements |
US6042008A (en) * | 1996-07-01 | 2000-03-28 | Denso Corporation | Toll collection system of toll road and in-vehicle unit for the same |
US6617960B1 (en) * | 1998-02-18 | 2003-09-09 | Teamaxess Ticketing Gmbh | Arrangement for controlling access of persons, and access terminal |
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US7061383B2 (en) * | 2001-11-15 | 2006-06-13 | United Air Lines, Inc. | Radio frequency check-in |
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US20070018816A1 (en) * | 2003-07-18 | 2007-01-25 | Lintec Corporation | Antenna for detecting magnetic field, and gate for detecting detection tag employing the antenna |
US20050168385A1 (en) * | 2004-02-04 | 2005-08-04 | Baker John E. | Free standing column-shaped structure for housing RFID antennas and readers |
EP1577842A2 (en) * | 2004-03-19 | 2005-09-21 | SkiData AG | Access control device |
DE102004013965B3 (en) | 2004-03-19 | 2005-12-01 | Skidata Ag | Access control device |
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US7360695B2 (en) * | 2004-03-19 | 2008-04-22 | Skidata Ag | Access control apparatus |
US20080088449A1 (en) * | 2004-12-21 | 2008-04-17 | Tagsys, A Corporation Of France | Antenna Arrangement |
US20060214799A1 (en) * | 2005-03-25 | 2006-09-28 | Seiko Epson Corporation | Reader/writer |
US7541930B2 (en) * | 2005-06-14 | 2009-06-02 | Nokia Corporation | Apparatus and method for controlling diverse short-range antennas of a near field communications circuit |
US7762022B2 (en) * | 2005-07-08 | 2010-07-27 | Bea, Inc. | Automatic door opening and closing system and method of control thereof |
US20070205896A1 (en) * | 2006-03-02 | 2007-09-06 | Axcess International Inc. | System and Method for Determining Location, Directionality, and Velocity of RFID Tags |
Also Published As
Publication number | Publication date |
---|---|
EP1892676A1 (en) | 2008-02-27 |
JP2008041096A (en) | 2008-02-21 |
US20090051483A1 (en) | 2009-02-26 |
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